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EnglishEnd-member extraction could be considered as the most challenging stage of the spectral unmixing process. In this study, a new approach is proposed based on error analysis of Linear Spectral Mixture Model (LSMM) to extract optimal pure pixels. First a number of approximate end-members are identified visually or using N-Finder algorithm then LSMM is applied to identify pixels with proportions greater than one (over-shoots). Over-shoots are then replaced with initial end-members and the LSMM is performed again. This process is continued until reduction of the number of overshoot and under-shoot pixels below 5% of total image pixels. According to the results, the proposed end-member extraction approach satisfies this criterion within a few iterations (2 or 3 runs). The total numbers of under/over shoots are estimated 4.17% and 3.55% of total image pixels respectively for choosing the initial end-members visually and by means of N-Finder algorithm.
Improvement of linear spectral unmixing results using over-shoot pixels (case study: URMIA lake basin) / Niroumand Jadidi, Milad; Vitti, Alfonso; Jannati, Mojtaba; Salehi, Sara. - ELETTRONICO. - (2015), pp. 4432-4435. ((Intervento presentato al convegno IGARSS 2015 tenutosi a Milano nel 26th July-31th July 2015.
| Titolo: | Improvement of linear spectral unmixing results using over-shoot pixels (case study: URMIA lake basin) |
| Autori: | Niroumand Jadidi, Milad; Vitti, Alfonso; Jannati, Mojtaba; Salehi, Sara |
| Autori Unitn: | |
| Titolo del volume contenente il saggio: | Geoscience and Remote Sensing Symposium (IGARSS), 2015 IEEE International |
| Luogo di edizione: | New York |
| Casa editrice: | IEEE |
| Anno di pubblicazione: | 2015 |
| Codice identificativo Scopus: | 2-s2.0-84962537531 |
| Codice identificativo ISI: | WOS:000371696704127 |
| ISBN: | 978-1-4799-7929-5 978-1-4799-7929-5 |
| Handle: | http://hdl.handle.net/11572/117362 |
| Citazione: | Improvement of linear spectral unmixing results using over-shoot pixels (case study: URMIA lake basin) / Niroumand Jadidi, Milad; Vitti, Alfonso; Jannati, Mojtaba; Salehi, Sara. - ELETTRONICO. - (2015), pp. 4432-4435. ((Intervento presentato al convegno IGARSS 2015 tenutosi a Milano nel 26th July-31th July 2015. |
| Appare nelle tipologie: | 04.1 Saggio in atti di convegno (Paper in proceedings) |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Niroumand_etal_2015.pdf | Versione editoriale (Publisher’s layout) | Tutti i diritti riservati (All rights reserved) | Administrator |
http://hdl.handle.net/11572/117362
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